I think our kk might have something!
The left behind spouse is literally, physically, emotionally, mentally FORCED into changing...but the run away is so busy running that they don't do much else.
So, while you, the strong one GREW, LEARNED, SEARCHED...he was still waiting for you to fix it. And only now is he realizing that HE has to fix it.
He has confronted his fears (you abandoning, judging , never forgiving) and has said he needs to be the one to do some work now.
And he had GARY for goodness sake...it's a wonder he has one thought in his head, let alone all he has said.
So, I think kitty is right in that he has finally begun the process.
But who is to say that he has to finish the process alone? Why can't he count on your SUPPORT...not your FIX...to get through this with the help of you and the kids?He really needs a counselor that knows exactly what to say to get him over the hump doesn't he?

Well Bets all I can offer is ((((((((HUGS)))))))))))), strong coffee and Kleenix. Hold on for a little while longer, girlfriend...you've let him know what is in your heart and now it is time for him to make his committment to you and the kids.
Love and prayers and better days!
Linda